Organisms contain different levels of organization within their bodies. Arachnoidiscus ehrenbergi, pictured below, is a single-celled organism that is part of the group of algae known as diatoms. A microscopic image of Arachnoidiscus ehrenbergi.
Photo by Gordon T. Taylor, courtesy of the NOAA

Which level of organization is seen in both Arachnoidiscus ehrenbergi and the human stomach?
cell
tissue
organ
organ system

Which best describes carbon dioxide’s path out of the body

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth

Which of the following determines the specificity of a dna probe? a. type of radiation b. level of enzymatic activity c. number of neutrons d. complementary base pairing